[HAM] Leslie 147's

[David Anderson]

Jordan,

Potentially, it could work. What it would accomplish is to cancel any  
AC hum or other noise picked up equally by balanced signal wires in  
the Leslie cable. Then, you'd use a 1:1 transformer to convert the  
signal back to unbalanced at the Leslie end.

If it's a good quality transformer, you shouldn't get much signal  
loss. Whether it's really a good idea is another question. If you do  
it, you end up with a non-standard Leslie hookup, which is generally  
considered a bad idea.

It is normal to get some hum and buzz from an AO-28 turned all the  
way up. It can be minimized, but there will always be a bit of it.  
You can sometimes lower it by swapping tubes, especially the 12AX7.  
Some tube sellers will select low-noise tubes for you for an extra fee.

My 122 amplifier started life as a 147 :-)

David

On May 26, 2008, at 10:20 AM, Jordan Kersten wrote:

>
> I was thinking of having the transformer in the organ.  One side of  
> the transformer has Gnd and both "G" terminals the other side has  
> the two signal lines to the 147 amp.  Would that be quieter?  Would  
> it cause a major signal loss?
>